package com.jdy.haoduoaiteacher.view;//package com.jdy.haoduoaiteacher.view;
//
//import android.graphics.RectF;
//
//public final class MathUtils {
//
//  /**
//   * Truncates a float number {@code f} to {@code decimalPlaces}.
//   * 
//   * @param f
//   *          the number to be truncated.
//   * @param decimalPlaces
//   *          the amount of decimals that {@code f} will be truncated to.
//   * @return a truncated representation of {@code f}.
//   */
//  protected static float truncate(float f, int decimalPlaces) {
//    float decimalShift = (float) Math.pow(10, decimalPlaces);
//    return Math.round(f * decimalShift) / decimalShift;
//  }
//
//  /**
//   * Checks whether two {@link RectF} have the same aspect ratio.
//   * 
//   * @param r1
//   *          the first rect.
//   * @param r2
//   *          the second rect.
//   * @return {@code true} if both rectangles have the same aspect ratio,
//   *         {@code false} otherwise.
//   */
//  protected static boolean haveSameAspectRatio(RectF r1, RectF r2) {
//    // Reduces precision to avoid problems when comparing aspect ratios.
//    float srcRectRatio = MathUtils.truncate(MathUtils.getRectRatio(r1), 2);
//    float dstRectRatio = MathUtils.truncate(MathUtils.getRectRatio(r2), 2);
//
//    // Compares aspect ratios that allows for a tolerance range of [0, 0.01]
//    return (Math.abs(srcRectRatio - dstRectRatio) <= 0.01f);
//  }
//
//  /**
//   * Computes the aspect ratio of a given rect.
//   * 
//   * @param rect
//   *          the rect to have its aspect ratio computed.
//   * @return the rect aspect ratio.
//   */
//  protected static float getRectRatio(RectF rect) {
//    return rect.width() / rect.height();
//  }
// }
